中国空间科学技术2019，Vol.39Issue(4)：73-81,9.DOI:10.16708/j.cnki.1000‐758X.2019.0032
微型镓场发射电推力器的研制和点火特性
Development and ignition characteristics of miniature gallium fi el d emi ssi on el ectri c propul sion thrust er
摘要
Abstract
In order to meet the demand for propulsion systems of micro‐nano spacecraft such as the cubic satellite , the first needle‐type miniature gallium field emission electric propulsion thruster in China was developed.The problem that gallium is difficult to fully wet the tungsten needle under vacuum environment was solved by increasing the wetting temperature.The thruster′s stable ignition was realized ,and the thruster′s ignition characteristics under different wetting temperatures and different geometric parameters were tested.The relationship is obtained that the emission current increases as the wetting temperature increases , the pole spacing decreases ,and the inner hole diameter of absorbing pole increases.The theoretical thrust under different emission currents is given by formula calculation.The electric field strength under different geometric parameters is obtained by simulation , and the reason why the geometric parameters affect the emission current is revealed.关键词
场发射电推力器/发射针/润湿/点火特性/发射电流/电场强度/电推进Key words
FEEP /emission needle /wetting /ignition characteristics /emission current /electric field intensity /electric propulsion分类
航空航天引用本文复制引用
徐明明,康小明,郭登帅,刘欣宇,贺伟国..微型镓场发射电推力器的研制和点火特性[J].中国空间科学技术,2019,39(4):73-81,9.基金项目
国家自然科学基金(No .51675341) （No .51675341）
